The William Dendy Library consists of more than 3,500 books and 2,500 periodical issues. For the most part, the collection focuses on the history of architecture, but other topics, such as music and literature, are featured as well.

Fonds consists of materials documenting William Dendy's life and career as an architectural historian including university course notes, research material for published works, research material on the history of Canadian architecture and other research interests such as Forest Hill, Hamilton, the architects Frank Darling and William Somerville, and the Massey family. Some materials relate to Dendy's teaching activities, Toronto walking tours and consultancy projects.

Also present are articles, card files, clippings, correspondence, electronic records, ephemera, manuscripts, maps, manuscript and typescript notes, as well as photographs, negatives, and approximately 40,000 slides (including more than 17,000 images of Canadian architecture, urban space, and landscape). The slides were taken by Dendy and are each individually identified by him.

Collection comprises two separate series of items. The first are the architectural drawings that were created for the contests for both the city of Kitchener city hall and municipal buildings. These plans were created by W.H.E. Schmalz and others. The rest of the collection comprises materials created by W.H.E. Schmalz both when he was a student and a professional architect. Includes primarily maps, architectural drawings and art work.

Fonds consists of material accumulated and kept by Ross Dixon relating to his entrepreneurial interests, career, and personal life, and to the philanthropic activities of Ross and Doris Dixon. The material documents some aspects of his personal interests and childhood, his early career, and his career in industrial relations at Uniroyal Canada (formerly the Dominion Rubber Company).

A significant portion of the fonds relates to the businesses he formed outside of his professional career, the Westmount Construction Company and Westmont Enterprises Limited, for the period from the late 1940s to the early 1970s. These records document trends in suburban home-building and design during that time and include a large number of architectural drawings.

The fonds is not comprehensive, lacking documentation relating to the formation and administration of the Westmount Construction Company and Westmont Enterprises Limited and containing only a small amount of material relating the other area of his entrepreneurial activities, investment and financial services.

Fonds includes correspondence, newspaper clippings, advertising material, architectural drawings, legal documents, photographs, accounting records, reports, handwritten notes, certificates, speeches, company publications, minutes, financial statements, ephemera, and other material.

The Rosa Breithaupt Clark Architectural Collection is the result of an endowment made by Herbert Spencer Clark in 1982 in memory of his late wife, Rosa Breithaupt Hewetson Clark, formerly of Kitchener. Included in purchases made through this endowment are exemplary treatises from the sixteenth to the twentieth century supportive of the School of Architecture's cultural history emphasis.

Awards made in 1987 and 1990 by the Social Sciences and Humanities Research Council (SSHRC) of Canada under their programme supporting the development of specialized research programmes enabled the collections to grow significantly. The first grant was dedicated to the purchase of landmark titles in the history and theory of architecture. Since the discourse of architecture ultimately looks back to the Roman writer, Vitruvius, it was appropriate that the first acquisition using these funds was a rare edition of a Vitruvian treatise printed in 1536.

The second of the SSHRC grants was awarded in 1990 specifically to support the collection in an area of critical importance: architectural developments in Northern Europe and on the North American frontier which have a profound effect on architectural theory and urban development in Canada.

A third award made by SSHRC allowed the Library to purchase The Dictionary of Architecture issued by the Architectural Publication Society (1853-1892), described as a monument to nineteenth-century scholarship.

One register book kept by the Ontario Association of Architects for the years 1890-1899. The book lists dues paid by each member of the association as well as money received for exam fees, filing articles, student fees and more. Also includes one item of correspondence from Mills & Hutton, architects asking the secretary for information on rates for architectural work. The register was kept by William R. Gregg.

Materials relating to the professional life of Michael Bird. Covers his time teaching at Renison University College, as well as his research and publications on folk art, fraktur, religious imagery and film.

One proposed plan for a home and 1/4 acre vegetable garden called Kitchener Park, designed by Landscape Architect John H. Melady.

Fonds consists of materials created and accumulated by John Ivan Rempel that document his professional life and activities in architecture and architectural heritage, primarily relating to his work "Building with wood." Includes materials relating to his activities; manuscripts and research materials; and photographs of wood construction.

The Jim Guy collection consists of materials accumulated by Jim Guy relating to his family home at 110 John Boulevard in the Westmount region of Waterloo. Includes architectural plans and specifications as well as home movies and slides showing the home and surrounding area.

Materials created or accumulated by the Reive Family, especially Dr. Wilfred G. Reive and Mabel M. Reive during the moving, purchasing, design, and construction of their family home at 178 Claremont Avenue. Includes invoices and cheques, architectural drawings, and family photographs.

This collection, donated to the University of Waterloo in 1988 by the family of the late Rosa Breithaupt Hewetson Clark and Spencer Clark, includes family papers from three families, the Breithaupt family, the Hewetson family, and the Clark family; records from the Guild of All Arts in Scarborough, Ontario, founded by Rosa Breithaupt Hewetson Clark and Spencer Clark; and several smaller collections acquired by the Breithaupt family and by Spencer Clark. The personal library of Spencer Clark, which includes many books, periodicals, government documents, and ephemeral items, was donated together with the archival collections, and is particularly strong in the fields of urban planning, architecture, and Canadian art.

Materials include family papers from three families, the Breithaupt family, the Hewetson family, and the Clark family; records from the Guild of All Arts in Scarborough, Ontario, founded by Rosa Breithaupt Hewetson Clark and Spencer Clark; and several smaller collections acquired by the Breithaupt family and by Spencer Clark. The personal library of Spencer Clark, which includes many books, periodicals, government documents, and ephemeral items, was donated together with the archival collections, and is particularly strong in the fields of urban planning, architecture, and Canadian art.

Fonds consists of two sketchbooks relating to A.G Shoosmith's studies at the Royal Academy Schools in London, England.

File consists of three architectural drawings of the building of the Berlin [Kitchener] Y.M.C.A. at 22 Queen Street North. Includes a side elevation, main and upper floor plans, and details of the locker room.

Fonds consists of materials created and accumulated by the Architectural Conservancy of Ontario : North Waterloo Region Branch. Includes operational files including minutes and finances, project and event files and ephemera, as well as a large body of subject and clipping files on local buildings, environmental bodies, and heritage organizations.